Fin of heat exchanger and heat exchanger

Abstract

The invention provides a fin of a heat exchanger and the heat exchanger. The fin comprises a fin body, the fin body is provided with a windward area, a middle area and a leeward area which are arranged in the first direction, the middle area is provided with an installation hole used for installing a refrigerant pipe, the windward area is provided with a drainage structure guiding flow in the second direction, and the second direction is perpendicular to the first direction and the axial direction of the installation hole. According to the fin, the drainage speed can be increased, and the performance of a heat exchanger is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a fin of a heat exchanger and a heat exchanger. Background Art

[0002] During the operation of the heat pump system, the temperature of the refrigerant inside the indoor heat exchanger is high and dissipates heat indoors, while the temperature of the refrigerant inside the outdoor heat exchanger is low and absorbs heat from the outdoors. When the outdoor air is cold and humid, the water vapor in the air is easily condensed on the heat exchanger to form condensed water. If the temperature of the heat exchanger is lower than the freezing point of water, this part of the condensed water will further condense into frost or ice. Among them, the heat exchanger mainly relies on the fins to exchange heat with the air. That is, during the heat exchange process, if the liquid on the fins is not discharged in time, the frost speed of the fins will be accelerated, or if the liquid cannot be discharged in time during the defrosting process, the defrosting process will be delayed, affecting the performance of the heat exchanger. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a fin of a heat exchanger and a heat exchanger, so as to improve the technical problem that the performance of the heat exchanger is reduced due to fin frosting.

[0004] A technical solution adopted in the present application is: to provide a fin of a heat exchanger, which includes a fin body, and the fin body is provided with a windward area, a middle area and a leeward area arranged along a first direction, wherein the middle area is provided with an installation hole for installing a refrigerant pipe, and the windward area is provided with a drainage structure for guiding flow along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the installation hole.

[0005] The drainage structure includes a flat portion and a raised portion arranged along a first direction, and a size of the flat portion along the first direction is 0.1 mm-0.5 mm.

[0006] The drainage structure includes a first guide groove and a second guide groove spaced apart along a first direction, wherein the notch of the first guide groove and the notch of the second guide groove are respectively arranged on two side surfaces of the windward area that are axially opposite to each other.

[0007] Among them, along the first direction, a first flat portion is formed between the first guide groove and the second guide groove, and a second flat portion is formed between the first guide groove and the edge of the side of the windward area away from the middle area; along the axial direction, the groove wall of the first guide groove is protruded relative to the first flat portion and the second flat portion, and the groove wall of the second guide groove is protruded relative to the first flat portion; wherein the dimensions of the first guide groove and the second guide groove along the first direction, the dimensions of the first guide groove and the second guide groove along the axial direction, and the dimensions of the first flat portion and the second flat portion along the first direction are all 0.1mm-0.5mm.

[0008] A third guide groove is also formed in the middle area, and the notch of the third guide groove is arranged on the same side as the notch of the second guide groove.

[0009] The third guide groove includes an annular guide groove surrounding the circumference of the mounting hole and a fourth guide groove connected to the annular guide groove and extending along the second direction.

[0010] The fin further comprises a connecting plate, which is connected to a side of the windward region away from the middle region along a first direction, wherein the connecting plate is arranged obliquely with the windward region.

[0011] The connecting plate includes a plurality of sub-connecting plates which are connected to a side of the windward area away from the middle area at intervals along the second direction.

[0012] The plurality of sub-connecting plates include a plurality of first sub-connecting plates and a plurality of second sub-connecting plates, and the first sub-connecting plates and the second sub-connecting plates are respectively inclined at two side surfaces which are arranged axially opposite to each other in the windward area.

[0013] The present application provides a heat exchanger, which includes the above-mentioned fins and a refrigerant tube, and the refrigerant tube is installed in the installation hole of the fin.

[0014] The beneficial effects of the present application are as follows: the fin provided by the present application includes a fin body, the fin body is provided with a windward area, a middle area and a leeward area arranged along a first direction, wherein the middle area is provided with a mounting hole for mounting a refrigerant pipe, and the windward area is provided with a drainage structure for diverting flow along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the mounting hole. Since the windward area of ​​the fin body contacts the airflow earlier than the middle area and the leeward area, the air first forms condensed water in the windward area of ​​the fin body. The present application sets a drainage structure for diverting flow along the second direction in the windward area, that is, sets a drainage structure in the area where condensed water is first formed, which can speed up the speed at which condensed water is discharged from the fin body, thereby delaying the frosting time of the fins, and further improving the performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an oil stain adhesion device provided by the present application;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of a fin provided by the present application;

[0018] Figure 3 yes Figure 2 A structural schematic diagram of another view of the embodiment;

[0019] Figure 4 It is a structural schematic diagram of an embodiment of a drainage structure provided by the present application;

[0020] Figure 5 It is a structural schematic diagram of an embodiment of a drainage structure provided by the present application;

[0021] Figure 6 is a structural schematic diagram of an embodiment of a fourth guide groove provided by the present application;

[0022] Figure 7 It is a structural schematic diagram of another embodiment of the fin provided in the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] The present application provides a heat exchanger, referring to Figure 1 , Figure 1It is a structural schematic diagram of an embodiment of a heat exchanger provided by the present application, and the heat exchanger 01 includes a refrigerant tube 20 and a fin 10. Among them, the fin 10 is provided with a mounting hole, and the refrigerant tube 20 is installed in the mounting hole. The refrigerant tube 20 is in close contact with the fin 10, so the temperature of the fin 10 is close to the temperature of the refrigerant tube 20. Among them, the heat exchanger 01 includes an air inlet side and an air outlet side, and the airflow direction refers to the direction of the airflow from the air inlet side to the air outlet side. When the airflow is from the air inlet side to the air outlet side, that is, when the airflow flows through the gap between the fins 10, the heat exchange with the fins 10 and the refrigerant tube 20 is completed.

[0027] In order to clearly describe the structure of the fin body, the fin body is divided into an edge area, a middle area, and an edge area on the other side of the middle area along the airflow direction. That is, along the airflow direction, the fin body is divided into an edge area, a middle area, and an edge area in sequence. Among them, the edge area close to the air inlet side can be regarded as the windward area, and the edge area away from the air inlet side or close to the air outlet side can be regarded as the leeward area.

[0028] See also Figure 2 and Figure 3 , Figure 2 is a schematic structural diagram of an embodiment of a fin provided in this application, Figure 3 yes Figure 2 In another structural diagram of the embodiment, the fin body 100 is provided with a windward region, a middle region and a leeward region arranged along a first direction X, wherein the middle region is provided with a mounting hole 120 for mounting a refrigerant pipe, and the windward region is provided with a drainage structure 110 for guiding flow along a second direction Y, and the second direction Y is perpendicular to the first direction X and the axial direction Z of the mounting hole 120. The first direction X is parallel to the airflow direction.

[0029] It can be known that when the temperature of the refrigerant in the refrigerant pipe is lower than the ambient air temperature, the temperature of the fin 10 is also lower than the ambient temperature, so condensed water or frost can be formed in the entire fin 10 area. Among them, the windward area of ​​the fin body 100 contacts the airflow first compared to the middle area and the leeward area, so the windward area of ​​the fin body 100 first exchanges heat with the airflow, so the air is first condensed in the windward area to form condensed water, and when the condensed water flows slowly downward along the edge of the fin 10 under the force of gravity, it is very easy to form frost or ice. That is, if the liquid on the fin body 100 is not discharged in time, frost will form on the fin 10, or the frost layer is not easy to fall off, which prolongs the defrosting time, etc., resulting in a decrease in the heat exchange performance of the heat exchanger. In order to improve the heat exchange performance of the heat exchanger, the present application sets a drainage structure 110 that guides along the second direction Y in the windward area, which can speed up the speed of liquid in the windward area to discharge from the fin body 100, thereby delaying the frosting time of the fin 10, or speeding up the defrosting speed, and thus improving the performance of the heat exchanger.

[0030] When the fin 10 is in use, the first direction X is set parallel to the airflow direction; the second direction Y is parallel to the gravity direction. For example, during the heat exchange between the fin body 100 and the airflow, the condensed water formed by the air in the windward area of ​​the fin body 100 can be guided along the gravity direction by the drainage structure 110 located in the windward area and discharged from the fin body 100 in time, thereby delaying the frosting time of the fin body 100 and improving the performance of the heat exchanger. During the defrosting period of the fin body 100, the drainage structure 110 can discharge the condensed water formed in the defrosting process from the fin body 100 in time, which can speed up the defrosting time, reduce the amount of water stored between the fins 10, avoid the deterioration of the next frosting cycle, and improve the performance of the heat exchanger.

[0031] Optionally, in order to speed up the drainage of liquid on the fin body 100, drainage structures 110 for guiding the liquid along the second direction Y are provided at the edge areas on both sides of the middle area.

[0032] In other embodiments, along the first direction X, a plurality of drainage structures 110 are spaced apart in the edge region to accelerate the drainage speed of the liquid on the fin body 100 .

[0033] Optionally, see Figure 4 , Figure 4 1 is a schematic diagram of a structure of an embodiment of a drainage structure provided by the present application. The drainage structure 110 includes a flat portion 101 and a raised portion 102 arranged along a first direction X. The size of the flat portion 101 along the first direction X is 0.1 mm-0.5 mm. For example, the size of the flat portion 101 along the first direction X is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. Among them, the flat portion 101 and the raised portion 102 can form a wetting step track, that is, a guide track based on the wetting step method. The present application utilizes the ultra-narrow width of the flat portion 101 to reduce the contact area between the droplet and the surface of the flat portion 101, thereby effectively reducing the capillary resistance faced by the movement of the droplet, and can make the capillary force of the convex portion 102 on the droplet greater than the gravity of the droplet, so that the droplet can converge toward the convex portion 102, so that the drainage structure 110 has the function of converging along the first direction X, so that the converged liquid can flow faster along the second direction Y under the action of gravity, and can accelerate the discharge of the droplet from the fin body 100; in addition, when the droplet moves on the surface of the flat portion 101, the liquid is subjected to the force of the airflow along the first direction X in the windward area of ​​the fin body 100, and the side of the flat portion 101 close to the middle area is the convex portion 102 that is higher than the flat portion 101 in the axial direction Z of the mounting hole 120. Therefore, there are strong energy barriers on both sides of the flat portion 101 along the first direction X, and the droplet cannot overcome such energy barriers to spread to the left and right, and can only flow along the second direction Y, that is, the gravity direction, which can increase the discharge speed of the liquid.

[0034] The flat portion 101 may be a plane with no protrusions on the surface.

[0035] Optionally, the fin body 100 is formed by stamping, and a guide groove is formed on the back side of the protrusion 102 of the fin body 100, and the guide groove can guide the condensed water formed on the back side of the protrusion 102 to accelerate the discharge speed of the liquid.

[0036] Optionally, see Figure 5 , Figure 5 It is a structural schematic diagram of another embodiment of the drainage structure provided by the present application, and the drainage structure 110 includes a first guide groove 111 and a second guide groove 112 arranged at intervals along a first direction X, wherein the notch of the first guide groove 111 and the notch of the second guide groove 112 are respectively arranged on two side surfaces of the windward region that are arranged opposite to each other along the axial direction Z. It can be understood that the windward region is provided with the first guide groove 111 and the second guide groove 112 on two opposite sides of the axial direction Z of the mounting hole 120, so that the first guide groove 111 and the second guide groove 112 can gather and guide the liquid on both sides of the windward region, which can increase the drainage speed of the windward region, delay the frosting time or accelerate the defrosting process, and improve the performance of the heat exchanger.

[0037] The first guide groove 111 and the second guide groove 112 may be formed by stamping the fin body 100 .

[0038] Optionally, along the first direction X, a first flat portion 113 is formed between the first guide groove 111 and the second guide groove 112, and a second flat portion 114 is formed between the first guide groove 111 and the edge of the side of the windward area away from the middle area. Along the axial direction Z of the mounting hole 120, the groove wall 115 of the first guide groove is protruding relative to the first flat portion 113 and the second flat portion 114, and the groove wall 116 of the second guide groove is protruding relative to the first flat portion 113. Among them, the dimensions of the first guide groove 111 and the second guide groove 112 along the first direction X, the dimensions of the first guide groove 111 and the second guide groove 112 along the axial direction Z, and the dimensions of the first flat portion 113 and the second flat portion 114 along the first direction X are all 0.1mm-0.5mm. In this embodiment, the first flat portion 113 and the groove wall 116 of the second guide groove, the second flat portion 114 and the groove wall 115 of the first guide groove, the first flat portion 113 and the groove wall 115 of the first guide groove, and the groove wall 116 of the second guide groove and the fin body 100 near the middle area can all form a wetting step track, that is, the ultra-narrow width of the first flat portion 113, the second flat portion 114, etc. is used to reduce the contact area between the droplet and the surface of the first flat portion 113, the second flat portion 114, etc., thereby effectively reducing the capillary resistance faced by the movement of the droplet, and the capillary force of the groove wall 115 and the groove wall 116 of the first guide groove on the droplet can be greater than the gravity of the droplet, so that the droplet can move toward the groove wall 115 of the first guide groove and the second guide groove. The groove wall 116 converges, so that the first guide groove 111 and the second guide groove 112 have the function of converging along the first direction X, so that the converged liquid can flow faster along the second direction Y under the action of gravity, and can accelerate the discharge of droplets from the fin body 100; in addition, the first guide groove 111 and the second guide groove 112 can converge and guide the liquid on both sides of the windward area, further accelerating the liquid discharge speed; further, the dimensions of the first guide groove 111 and the second guide groove 112 along the first direction X and the dimensions of the first guide groove 111 and the second guide groove 112 along the axial direction Z are both 0.1mm-0.5mm, so that the droplets can flow without mutual engulfment or aggregation, which can reduce the time for droplet engulfment or aggregation, and achieve rapid drainage.

[0039] Optionally, in order to speed up the discharge speed of the liquid on the fin body 100, a third guide groove 130 is further formed in the middle area, and the notch of the third guide groove 130 is arranged on the same side as the notch of the second guide groove 112. Among them, the third guide groove 130 can be connected with the second guide groove 112, for example, the third guide groove 130 is connected to the second guide groove 112 through other guide grooves. In this embodiment, the third guide groove 130 is arranged in the middle area, so that the liquid in the middle area can be discharged through the third guide groove 130, which can speed up the speed of liquid discharge from the fin body 100 and reduce the residual amount of liquid on the fin body 100.

[0040] Optionally, see Figure 2 , along the first direction X, a first inclined portion 161 and a third flat portion 162 are sequentially arranged between the side of the second guide groove 112 away from the first guide groove 111 and the third guide groove 130, wherein the first inclined portion 161 is arranged at an obtuse angle with the side of the second guide groove 112 away from the first guide groove 111 and the third flat portion 162. It can be understood that in the axial direction Z of the mounting hole 120, the third flat portion 162 is higher than the plane where the opening of the second guide groove 112 is located, and the angle between the two and the first inclined portion 161 is an obtuse angle, so the first inclined portion 161 has a guide function. That is, the liquid on the third flat portion 162 can be accelerated to converge to the second guide groove 112 through the first inclined portion 161, so that the liquid on the third flat portion 162 can be discharged from the fin body 100 through the second guide groove 112, accelerating the discharge of liquid in the middle area of ​​the fin body 100, and reducing the residual amount of liquid on the fin body 100, thereby delaying the frosting time of the fin body 100 or accelerating the defrosting speed of the fin body 100, thereby improving the heat exchange performance of the heat exchanger.

[0041] Optionally, see Figure 2 , along the first direction X, the third flat portion 162 is connected to the side wall of the third guide groove 130 through the second inclined portion 163, wherein the second inclined portion 163 is respectively arranged at an obtuse angle with the side wall of the third guide groove 130 and the third flat portion 162. In this embodiment, by providing the second inclined portion 163, and the second inclined portion 163 is respectively arranged at an obtuse angle with the side wall of the third guide groove 130 and the third flat portion 162, the second inclined portion 163 has a guiding function, and the liquid on the third flat portion 162 can also accelerate the speed of converging to the third guide groove 130 through the second inclined portion 163, so that the liquid on the third flat portion 162 can also be discharged from the fin body 100 through the third guide groove 130, further accelerating the discharge of the liquid in the middle area of ​​the fin body 100, and reducing the residual amount of liquid on the fin body 100, thereby delaying the time of frosting of the fin body 100 or accelerating the speed of defrosting of the fin body 100, thereby improving the heat exchange performance of the heat exchanger.

[0042] Optionally, see Figure 2 The third guide groove 130 includes an annular guide groove 131 surrounding the mounting hole 120 and a fourth guide groove 132 connected to the annular guide groove 131 and extending along the second direction Y. The annular guide groove 131 can be used to gather liquid around the mounting hole 120, and guide and discharge the liquid from the fin body 100 along the second direction Y through the fourth guide groove 132, which can further speed up the discharge speed of the liquid on the fin body 100.

[0043] Optionally, the annular guide groove 131 includes an annular bottom wall 1312 and an annular side wall 1311 arranged at an obtuse angle to the annular bottom wall 1312. The annular bottom wall 1312 is used for converging and discharging liquid, and the annular side wall 1311 is used for guiding the liquid to the annular bottom wall 1312.

[0044] Optionally, see Figure 6 , Figure 6 1 is a schematic diagram of the structure of an embodiment of the fourth guide groove provided by the present application. The fourth guide groove 132 includes a first side wall 1321 and a second side wall 1322. The second side wall 1322 and the bottom wall 1323 of the fourth guide groove are arranged at an obtuse angle, and the connection between the two is connected in an arc shape. The first side wall 1321 and the second side wall 1322 are arranged at an obtuse angle. The second side wall 1322 and the bottom wall 1323 of the fourth guide groove are used to converge liquid and guide along the second direction Y. The first side wall 1321 is used to guide the liquid to the space formed by the second side wall 1322 and the bottom wall 1323 of the fourth guide groove.

[0045] Specifically, the flow guide dimensions of the annular bottom wall 1312 and the bottom wall 1323 of the fourth flow guide groove are similar. Referring to the diameter of the condensed droplets when the hydrophilic surface is frosted, which is generally less than 0.5 mm, the flow guide dimensions of the annular bottom wall 1312 and the bottom wall 1323 of the fourth flow guide groove are both 0.1 mm-0.7 mm, for example, it can be 0.4 mm. According to the wettability theory, the capillary length Lc of the droplets on the hydrophilic surface is 2.7 mm, and the gravity cannot be ignored when it is greater than this diameter. Referring to this theory, the flow guide dimension between the two first side walls 1321 is 2.2 mm-3.2 mm, for example, it can be 2.2 mm, 2.7 mm, 3.0 mm, 3.2 mm, etc. The flow guide dimension of the annular side wall 1311 is approximately 0.5 to 2 times the flow guide dimension between the two first side walls 1321.

[0046] Among them, along the axial direction Z of the mounting hole 120, the fourth guide groove 132 is a V-shaped groove, and the bottom wall 1323 of the fourth guide groove can be regarded as the top of the V-shaped groove. Then the fourth guide groove 132 is an ultra-narrow hydrophilic V-shaped groove, which can make the defrosting water form a hydrophilic track as quickly as possible when the heat exchanger starts defrosting, realize stable hidden guidance, and thus achieve faster drainage. At the same time, the annular bottom wall 1312 can absorb the water droplets of the annular side wall 1311, and the residual water on the surface of the fin 10 can be absorbed by the first side wall 1321, and finally the residual water on the surface of the fin 10 is emptied to the maximum extent when the defrosting is completed, reducing the water storage between the fins 10 and avoiding the deterioration of the next frosting cycle.

[0047] In other embodiments, the fourth guide groove 132 may be a V-shaped guide groove, the top of the V-shaped guide groove is connected to the annular guide groove 131, and both ends of the V-shaped guide groove are arranged toward the second direction Y, which is not limited here.

[0048] Optionally, a plurality of mounting holes 120 spaced apart along the second direction Y may be provided in the middle region, and the third guide groove 130 is located between adjacent mounting holes 120 .

[0049] The first guide groove 111 , the second guide groove 112 and the fourth guide groove 132 extend continuously along the second direction Y, or form continuous flow diversion along the second direction Y through other flow channels.

[0050] Optionally, see Figure 7 , Figure 7 1 is a schematic diagram of the structure of another embodiment of the fin provided by the present application, wherein the fin 10 further comprises a connecting plate 150, which is connected to the side of the windward area away from the middle area along the first direction X, wherein the connecting plate 150 is arranged obliquely with the windward area. In this embodiment, the windward area of ​​the fin 10 is increased by arranging the connecting plate 150 arranged obliquely with the windward area. Compared with the fin body 100, the connecting plate 150 exchanges heat with the airflow first, so the air forms condensed water in the connecting plate 150 area first. Since the connecting area between the connecting plate 150 and the fin body 100 is far away from the refrigerant pipe 20, the temperature difference of the airflow reaching the refrigerant pipe 20 after passing through the connecting plate 150 is small, which can alleviate the generation of condensed water; in addition, the connecting plate 150 is far away from the refrigerant pipe 20, so the temperature of the connecting plate 150 is relatively high, which can inhibit the process of condensed water solidifying into frost, thereby improving the performance of the heat exchanger.

[0051] Optionally, the connecting plate 150 includes a plurality of sub-connecting plates, which are connected to the side of the windward area away from the middle area at intervals along the second direction Y. In the present application, the edge surface of the fin 10 is discontinuous by arranging the sub-connecting plates at intervals along the second direction Y. The thermal conductivity between the fin body 100 and the sub-connecting plates is poor compared to the thermal conductivity of the sub-connecting plates that are not arranged at intervals, so that the temperature on the sub-connecting plates is further higher than the temperature of the fin body 100 close to the refrigerant pipe 20, so the condensed water located thereon is not easy to frost. In addition, the liquid flow path of a single sub-connecting plate is short, and the condensed water easily falls off along the direction of gravity, thereby delaying the accumulation of the frost layer. Furthermore, during the defrosting process, the temperature of the fin 10 rises, thereby gradually melting the frost layer in contact with the fin 10. Since the frost layer attached to the position of the sub-connecting plate is discontinuous, it is conducive to the frost layer breaking and falling off directly during melting, thereby accelerating the defrosting process.

[0052] Optionally, the plurality of sub-connection plates 150 include a plurality of first sub-connection plates 151 and a plurality of second sub-connection plates 152, and the first sub-connection plates 151 and the second sub-connection plates 152 are respectively inclined toward the two side surfaces that are disposed opposite to each other along the axial direction Z in the windward region. In this embodiment, by arranging the first sub-connection plates 151 and the second sub-connection plates 152 to be inclined toward the two side surfaces that are disposed opposite to each other along the axial direction Z in the windward region, the flow path of the liquid along the second direction Y, i.e., the direction of gravity, in the plurality of first sub-connection plates 151 or the plurality of second sub-connection plates 152 can be shortened, and the condensed water can easily fall off along the direction of gravity, thereby delaying the accumulation of the frost layer. Furthermore, during the defrosting process, the temperature of the fin 10 increases, thereby gradually melting the frost layer in contact with the fin 10. Since the frost layer attached to the positions of the first sub-connection plates 151 and the second sub-connection plates 152 is discontinuous, it is conducive to the frost layer to break and fall off directly during melting, thereby accelerating the defrosting process.

[0053] Among them, a first sub-connecting plate 151 and a second sub-connecting plate 152 can be a group, or the first sub-connecting plate 151 and multiple second sub-connecting plates 152 can be a group, or multiple first sub-connecting plates 151 and second sub-connecting plates 152 can be a group, and multiple groups are arranged along the second direction Y, which is not limited here.

[0054] Optionally, the connecting plate 150 and the fin body 100 are integrally formed.

[0055] In other embodiments, the connecting plate 150 may be regarded as the windward region of the fin 10 . In this case, the drainage structure 110 may be disposed at an edge region of the connecting plate 150 , which is not limited herein.

[0056] Optionally, the fin body 100 includes micro-angle corrugated fins, and the crests of the micro-angle corrugated fins are located between the middle area and the edge area. That is, crests are arranged in the edge area and the middle area on both sides of the mounting hole 120, so as to guide the liquid in the middle area to the edge area and discharge the fin body 100 through the drainage structure 110 in the edge area.

[0057] Optionally, along the axial direction Z of the mounting hole 120 , the structures on both sides of the fin body 100 are the same; or one side of the fin body 100 includes the structures of all the above-mentioned fin 10 embodiments, and the other side of the fin body 100 is a flat sheet, which is not limited here.

[0058] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fin of a heat exchanger, characterized in that: include: The fin body is provided with a windward area, a middle area and a leeward area arranged along a first direction, wherein the middle area is provided with a mounting hole for installing a refrigerant pipe, and the windward area is provided with a drainage structure for guiding flow along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the mounting hole.

2. The fin according to claim 1, characterized in that: The drainage structure includes a flat portion and a convex portion arranged along the first direction, and a size of the flat portion along the first direction is 0.1 mm-0.5 mm.

3. The fin according to claim 1, characterized in that: The drainage structure comprises a first guide groove and a second guide groove spaced apart along the first direction, wherein the notch of the first guide groove and the notch of the second guide groove are respectively arranged on two side surfaces of the windward area that are opposite to each other along the axial direction.

4. The fin according to claim 3, characterized in that: Along the first direction, a first flat portion is formed between the first guide groove and the second guide groove, and a second flat portion is formed between the first guide groove and an edge of a side of the windward area away from the middle area; Along the axial direction, the groove wall of the first guide groove is protruded relative to the first flat portion and the second flat portion, and the groove wall of the second guide groove is protruded relative to the first flat portion; The dimensions of the first guide groove and the second guide groove along the first direction, the dimensions of the first guide groove and the second guide groove along the axial direction, and the dimensions of the first flat portion and the second flat portion along the first direction are all 0.1 mm-0.5 mm.

5. The fin according to claim 3, characterized in that: A third guide groove is also formed in the middle area, and the notch of the third guide groove is arranged on the same side as the notch of the second guide groove.

6. The fin according to claim 5, characterized in that: The third guide groove includes an annular guide groove surrounding the circumference of the mounting hole and a fourth guide groove connected to the annular guide groove and extending along the second direction.

7. The fin according to any one of claims 1 to 6, characterized in that: The fin further comprises: A connecting plate is connected to a side of the windward area away from the middle area along the first direction, wherein the connecting plate is inclined with the windward area.

8. The fin according to claim 7, characterized in that: The connecting plate includes a plurality of sub-connecting plates connected to a side of the windward area away from the middle area at intervals along the second direction.

9. The fin according to claim 8, characterized in that: The plurality of sub-connection plates include: A plurality of first sub-connecting plates and a plurality of second sub-connecting plates, wherein the first sub-connecting plates and the second sub-connecting plates are respectively inclined toward two side surfaces of the windward area that are arranged opposite to each other along the axial direction.

10. A heat exchanger, characterized in that: include: The fin according to any one of claims 1 to 9; The refrigerant pipe is installed in the installation hole of the fin.

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